Programmable flow rate transmitter

CP ... CH420R

Instructions Manual

R-MI-CH420R Rev.: 1 English version

2

Thank you for choosing the flowmeter series CP ... CH420 from Tecfluid S.A.

This instruction manual allows the installation and operation of the turbine flowmeter series CP … CH420. It is recommended to read it before using the equipment.

This document shall not be copied or disclosed in whole or in any part by any means, without the written permission of Tecfluid S.A.

Tecfluid S.A. reserves the right to make changes as deemed necessary at any time and without notice, in order to improve the quality and safety, with no obligation to update this manual.

Make sure this manual goes to the end user.

Keep this manual in a place where you can find it when you need it.

In case of loss, ask for a new manual or download it directly from our website www.tecfluid.com Downloads section.

Any deviation from the procedures described in this instruction manual, may cause user safety risks, damage of the unit or cause errors in the equipment performance.

Do not modify the equipment without permission. Tecfluid S.A. is not responsible for any problems caused by a change not allowed. If you need to modify the equipment for any reason, please contact us in advance.

PREFACE

WARNINGS

3

TABLE OF CONTENTS

1 INTRODUCTION ................................................................................... 4

2 ELECTRICAL CONNECTION ............................................................... 4

2.1 Power supply and analog output ............................................ 4

2.2 Pulse input ................................................................................ 5

3 OPERATION ......................................................................................... 5

3.1 Programming ............................................................................ 5

3.2 Serial number indication ......................................................... 7

3.3 Reset ......................................................................................... 7

4 MAINTENANCE ..................................................................................... 7

5 MEASUREMENT ERROR CORRECTIONS ......................................... 7

6 HART COMMUNICATION .................................................................... 8

7 PUSH BUTTON INHIBIT AND ”WRITE PROTECT” ........................... 9

8 MODELS ............................................................................................... 9

9 TECHNICAL CHARACTERISTICS ...................................................... 9

9.1 Power supply ............................................................................ 9

9.2 Totalizer .................................................................................... 9

9.3 Flow rate indication ................................................................. 9

9.4 General characteristics ........................................................... 10

9.5 Input terminals ......................................................................... 10

9.6 Input characteristics ................................................................ 10

9.6.1 COVOL .......................................................................... 10

9.6.2 Turbine ......................................................................... 10

10 DIMENSIONS ........................................................................................ 11

4

1 INTRODUCTION The electronic transmitters CP ... CH420R are DIN rail modules designed to work with Tecfluid’s oscillating piston flowmeters (COVOL) and turbine flowmeters. The instruments are supplied already configured for the type of input. The circuit is based on a microprocessor that, in function of the pulses per litre programmed, calculates the flow rate and totalizes the volume that flows through the meter and shows these values on a local indicator. The CH420R differs from CP420R in that it is also HART protocol compatible.

2 ELECTRICAL CONNECTION For the electrical connection, the transmitter has two screw terminal strip. For the electrical installation it is recommended to use multiple conductor cables with individual cable sections in the order of 0.25 to 0.5 mm2 in order to make it easier to connect. A twisted pair wiring should be used to avoid electrical interferences in the 4-20 mA loop. In some instances, shielded cable may be necessary.

Peel the outside insulation to free the inner cables. It is recommended to tin the ends of the wires to avoid loose ends. Screw down the cables in the corresponding positions of the terminal strip. To help in the wiring of the equipment, the description of the terminals is marked on the printed circuit next to the terminal strip.

Before connecting the power supply, you must be sure that the supply voltage is the correct one for the installation. The power supply voltage is indicated on the label of the transmitter.

2.1 Power supply and analog output The positive terminal of the power supply is connected to the position + and the positive terminal of the load in the position -. The negative terminals of the power supply and the load are connected together. The instrument works in a 2-wire system, that is, the supply and signal line is the same. It is recommended to use a twisted pair wiring or shielded cable to avoid interferences in the current loop.

5

2.2 Pulse input

Can be done directly from the instrument to terminals 1 and 2, regardless the polarity.

3 OPERATION To adapt the transmitter to the meter, the pulses per litre factor specified on the meter must be programmed. If the instrument has not been previously programmed or, due to an alteration in the data memory the instrument recovers the default factory values, then the display will show “PRESET”. This indication will disappear when the programming sequence has been completed. There are three push buttons with the following functions:

3.1 Programming In all the programming screens, the “RESET” push button exits the screen without saving the data in the memory, even if changes in the digits have been made or not . By pushing the two push buttons PROG at the same time, the display will change to the programming mode. In this mode there are 7 digits (four whole numbers and three decimals). The value that must be introduced is the pulses per litre factor given on the label of the COVOL or Turbine.

6

To do this, by pushing the push button marked with the arrow pointing upwards, the blinking digit will increase. On the ninth digit it turns again to zero. By pressing the push button marked with the arrow pointing left, the cursor will move to the next digit to be modified. On the seventh digit, by pressing this push-button the cursor will move back to the first digit on the display. When the value of the pulses per litre is correct, by pushing the two push buttons PROG at the same time, this value will be automatically saved into the memory and the units selection screen will appear .

To change the flow rate units, the push button marked with the arrow pointing upwards, must be pushed. To change the totalized volume units, the push button marked with the arrow pointing left must be pushed. The possible flow rate and totalized volume units are the following: Flow rate: There are 9 combinations made from 3 volume units and 3 time units. Volume / time l (litres) / s (second) m3 (cubic meters) / m (minute) ga (gallons) / h (hour) Totalized volume: There are 3 possible volume units, l (litres), m3 (cubic meters), ga (gallons) Note: 1ga = 3.785 litres. With the working units chosen, by pressing the two push buttons PROG, we go to the loop current programming.

In the first screen we program the flow rate equivalent to 4 mA (lower range). The measuring units will be the ones chosen in the previous screen. The push buttons have the same function as the pulses per litre programming. After that, we program the flow rate equivalent to 20 mA (upper range).

7

i/l n = New Pulses per litre Factor = ? (2.089)

3.2 Serial number indication By pressing the three push buttons, the display will show the serial number. To return to the usual screen, press any of the push buttons.

3.3 Reset By pushing the RESET push button, the counter will be set to zero and it will continue counting.

4 MAINTENANCE It does not require any special maintenance.

5 MEASUREMENT ERROR CORRECTIONS The calibration of the mechanical flowmeters is made with water at 20oC to obtain a calibration for a liquid of density 1 kg/l and viscosity of 1 mPa·s. If the flowmeter is used with a liquid of other characteristics from the above specified or due to turbulences in the flow, measurement errors can be induced. To correct these types of errors we can modify the pulses per litre factor programmed in the instrument.

Example 1 - Shortage of volume If we have a flowmeter body which specifies i/l = 1.985, and when we check the volume of a batch, we find that instead of having 100 litres as programmed, we only have 95 litres (5% less) and we must apply the following correction:

i/l = Original Pulses per litre Factor = 1.985 V = Expected Volume = 100 Vr = Real Volume = 95

In a CH420R, if during the programming sequence it receives a HART command that must be attended, the local programming will not be valid and all the data previously programmed will be lost. The screen will return to the normal working model and the word PROG will light on the screen, indicating this event. To remove the word PROG from the display, press any of the two PROG push buttons.

i/l n = i/l VVr

8

Example 2 - Excess of volume If we have a flowmeter body which specifies i/l = 1.985, and when we check the volume of a batch, we find that instead of having 100 litres as programmed, we only have 105 litres (5% more) and we must apply the following correction:

i/l = Original Pulses per litre Factor = 1.985 V = Expected Volume = 100 Vr = Real Volume = 105

i/l n = New Pulses per litre Factor = ? (1.887)

6 HART COMMUNICATION The CH420R transmitters have a HART communication MODEM The details of the characteristics with respect to the HART communication are available in the appropriate Field Device Specification

Resume of the principal communications characteristics:

Manufacturer, Model and Revision Tecfluid S.A., CH420R, Rev. 0

Device type Transmitter

Hart Revision 6.0

Device Description available No

Number and type of sensors 1, external

Number and type of actuators 0

Number and type of host side signals 1, 4 – 20 mA analog

Number of Device Variables 2

Number of Dynamic Variables 1

Mappable Dynamic Variables No

Number of Common Practice Commands 13

Number of Device Specific Commands 2

Bits of Additional Device Status 12

Alternative operating modes? No

Burst mode? No

Write Protection? Yes

i/l n = i/l VVr

9

Analog loop electrical characteristics for communications : Reception Impedance : Rx > 8,5 MΩ Cx < 200 pF

7 PUSH BUTTON INHIBIT AND “WRITE PROTECT” The transmitter has a jumper situated behind the PCB at the top left corner, which can be used to avoid changes in the configuration. When the jumper is removed, the push buttons are disabled and the HART write protect is activated, thus inhibiting any changes in the configuration. To gain access, remove the left hand side cover.

8 MODELS

C __ 420 __ __ __

AV Explosion proof enclosure

C COVOL input

T Turbine input

L Local mounting on the flow meter

R DIN rail mounting inside a switchboard

P Panel mounting

P Transmitter with analog output

H Transmitter with analog output and HART communication

9 TECHNICAL CHARACTERISTICS

9.1 Power supply 2 wires, by means of the loop current. The instrument has a protection diode to avoid damage if the power supply is connected with inverted polarity . Nominal voltage: 12 ... 36 VDC Power consumption: ≤ 20 mA

9.2 Totalizer N. of digits: 7 Size of the digit: 8 mm

Reset: By means of push button

9.3 Flow rate Indication N. of digits: 5 Size of the digit: 5 mm

10

9.4 General characteristics Ingress protection: IP40 Ambient temperature range: 0ºC … +60 ºC

9.5 Input terminals The pulse input is connected to a screw terminal block marked as Pulse. Terminal n. COVOL Turbine 1 Common Live 2 Live Live

9.6 Inputs characteristics Note: The input terminals are not isolated from the 4-20 mA loop. Under no circumstances can an electrical connection be made between the 4-20 mA loop and the inputs. In the event of supplying various transmitters with the same power supply one must make sure that the inputs are isolated between each other.

9.6.1 COVOL If the Pulse input is configured for Covol (jumpers in position 2-3), a potential free contact can be connected between terminals 1 & 2. Terminal 1 is connected to the common of the instrument. This input has a 1 MΩ pull-up resistor connected to terminal 2 and to the 3,3 V power supply. The input has a hysteresis with the switching points situated at about 1 V & 2,1 V. If an open collector transistor is to be used as the switching element instead of a COVOL, then the aforementioned parameters must be taken into account.

Due to the presence of a filter to avoid the effects of contact bounce, the maximum pulse frequency for the COVOL input is 130 Hz. The minimum input frequency is 0.06 Hz

9.6.2 Turbine If the Pulse input is configured for Turbine (jumpers in position 1-2), a coil of a magnetic pick-up can be connected. The input impedance is 1.2 KΩ. This input is protected to limit the maximun applied voltage to the circuit. This protection consists of two diodes in parallel and two 100 Ω resistors.

1 M

2 2

1 1

+3.3V

100

1K

10022

13

Pick-up

11

10 DIMENSIONS

The maximum voltage that can be applied to the input is 10 Vpp. Voltages higher than this can cause damage to the equipment. The maximum input frequency is 5000 Hz The minimum input voltage is 7 mVpp

Complies with the following Directives 2004/108/CE Electromagnetic compatibility 2002/96/CE Waste electrical and electronic equipment

12

WARRANTY

Tecfluid S.A. guarantees all the products for a period of 24 months from their sale, against all faulty materials, manufacturing or performance. This warranty does not cover failures which might be imputed to misuse, use in an application different to that specified in the order, the result of service or modification carried out by personnel not authorized by Tecfluid S.A., wrong handling or accident.

This warranty is limited to cover the replacement or repair of the defective parts which have not damaged due to misuse, being excluded all responsibility due to any other damage or the effects of wear caused by the normal use of the devices.

Any consignment of devices for repair must observe a procedure which can be consulted in the website www.tecfluid.com, “After-Sales” section.

All materials sent to our factory must be correctly packaged, clean and completely exempt of any liquid, grease or toxic substances.

The devices sent for repair must enclose the corresponding form, which can be filled in via website from the same “After-Sales” section.

Warranty for repaired or replaced components applies 6 months from repair or replacement date. Anyway, the warranty period will last at least until the initial supply warranty period is over.

TRANSPORTATION

All consignments from the Buyer to the Seller´s installations for their credit, repair or replacement must always be done at freight cost paid unless previous agreement.

The Seller will not accept any responsibility for possible damages caused on the devices during transportation.

Tecfluid S.A. Narcís Monturiol 33 08960 Sant Just Desvern Barcelona Tel:   +34 93 372 45 11 Fax:  +34 93 473 44 49 tecfluid@tecfluid.com www.tecfluid.com 

The technical data described in this manual is subject to modifica on without no fica on if the technical innova ons in the manufacturing processes so require. 

Quality Management System ISO 9001 cer fied by  Pressure Equipment Direc ve 97/23/CE cer fied by  ATEX European Direc ve 94/9/CE cer fied by 

HART® is a registered trademark of HART Communica on Founda on 

Instruccions Manual - Programmable flow rate transmitter CP420R...CH420R1. INTRODUCTION 2. ELECTRICAL CONNECTION 2.1 Power supply and analog output 2.2 Pulse imput

3. OPERATION3.1 Programming3.2 Serial number indication3.3 Reset

4. MAINTENANCE5. MEASUREMENT ERROR CORRECTIONS6. HART COMMUNICATION7. PUSH BUTTON INHIBIT AND "WRITE PROTECT"8. MODELS 9. TECHNICAL CHARACTERISTICS9.1 Power supply9.2 Totalizer 9.3 Flow rate indication9.4 General characteristics9.5 Input terminals9.6 Input characteristics 9.6.1 COVOL9.6.2 Turbine

10. DIMENSIONS